we know they're inside syria. there is increasing medical shortage going on in terms of the ability to treat any of the victims, whether they be civilians or rebel fighters from these kinds of airstrikes. it really boils home as much as we've been talking about the ability of the syrian rebels to push into other cities, that the syrian air force still controls the skies and is still able to bomb, seemingly with impunity. gregg? gregg: is there any way to know, leland, whether the rebels are making headway in toppling the assad government? >> reporter: it certainly seems in the past couple of weeks the rebels are making strides. the videos we're seeing they're better armed, better equipped, better organized and command-and-control structure and they're able to take out a lot of syrian government positions particularly in the north. now we're seeing syrian rebels starting to move into towns that are predominantly christian or predominantly alawhite towns. this will be a big change for them. they will not be able to